What airlines fly to Illinois?

American Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Illinois from Austin according to our data. American Airlines is the first choice among our users, with 57% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Austin Bergstrom to Illinois?

Frontier, Spirit Airlines, and Southwest are the most popular carriers operating from Austin Bergstrom to Illinois

How many flights depart from Austin to Illinois on average per week?

As of July 2025, 253 flights take off from Austin and land in Illinois each week. The most common flight departure day for this route is Thu, with 20% of weekly flights taking off on this day.

How many flights depart from Austin to Illinois on average per day?

The number of flights available between Austin and Illinois is 36 per day as of July 2025. The most frequent departure time is 3:00PM, with 46% of daily flights leaving at noon.

When did momondo last update prices for flights from Austin Bergstrom Airport to Illinois?

Prices for flights from Austin Bergstrom Airport to Illinois refresh daily.

How many operators does momondo search for flights from Austin Bergstrom Airport to Illinois?

As of July 2025, there are 6 operators available to choose from for flights from Austin Bergstrom Airport to Illinois.

How old do you have to be to fly from Austin Bergstrom Airport to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Austin Bergstrom Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$75 Cheap Flights from Austin to Illinois in 2025

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Austin to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

10:59 am - 1:48 pmAUS-ORD

2h 49mnonstop

7:15 am - 10:05 amORD-AUS

2h 50mnonstop

$111Frontier

Find Deal

vie., oct. 17 - lun., oct. 20

11:27 am - 2:20 pmAUS-ORD

2h 53mnonstop

7:30 am - 10:37 amORD-AUS

3h 07mnonstop

$144Frontier

Find Deal

lun., sep. 8 - vie., sep. 12

12:45 pm - 2:55 pmAUS-STL

2h 10mnonstop

10:05 am - 12:05 pmSTL-AUS

2h 00mnonstop

$157Southwest

Find Deal

jue., ago. 28 - jue., sep. 4

7:15 am - 7:07 pmAUS-ORD

11h 52m1 stop

11:36 am - 8:45 pmORD-AUS

9h 09m1 stop

$160Spirit Airlines

Find Deal

jue., ago. 14 - mar., ago. 19

12:45 pm - 2:55 pmAUS-STL

2h 10mnonstop

6:10 am - 10:20 amSTL-AUS

4h 10m1 stop

$167Southwest

Find Deal

jue., sep. 18 - mié., sep. 24

7:15 am - 7:07 pmAUS-ORD

11h 52m1 stop

11:36 am - 12:59 amORD-AUS

13h 23m1 stop

$168Spirit Airlines

Find Deal

mié., ago. 13 - sáb., ago. 16

6:00 am - 8:49 amAUS-ORD

2h 49mnonstop

9:10 pm - 11:55 pmORD-AUS

2h 45mnonstop

$169American Airlines

Find Deal

jue., sep. 4 - lun., sep. 8

8:00 am - 10:50 amAUS-ORD

2h 50mnonstop

8:26 am - 11:08 amORD-AUS

2h 42mnonstop

$170American Airlines

Find Deal

sáb., ago. 23 - lun., ago. 25

12:48 pm - 3:43 pmAUS-ORD

2h 55mnonstop

7:15 am - 10:08 amORD-AUS

2h 53mnonstop

$193United Airlines

Find Deal

mar., ago. 19 - jue., ago. 21

5:30 am - 12:25 pmAUS-STL

6h 55m2 stops

6:15 am - 10:58 amSTL-AUS

4h 43m1 stop

$197United Airlines

Find Deal

sáb., sep. 13 - lun., sep. 15

Spirit Airlines flights from Austin to Illinois

Our best Spirit Airlines deals on Austin to Illinois flight tickets

Spirit Airlines

Aug 14

AUS7:15 amAustin Bergstrom

11h 52m

1 stop

ORD7:07 pmChicago O'Hare Intl

Aug 19

ORD11:36 amChicago O'Hare Intl

9h 09m

1 stop

AUS8:45 pmAustin Bergstrom

$160

Find similar

Spirit Airlines

Aug 13

AUS7:15 amAustin Bergstrom

11h 52m

1 stop

ORD7:07 pmChicago O'Hare Intl

Aug 16

ORD11:36 amChicago O'Hare Intl

13h 23m

1 stop

AUS12:59 amAustin Bergstrom

$168

Find similar

Spirit Airlines

Aug 14

AUS7:15 amAustin Bergstrom

11h 52m

1 stop

ORD7:07 pmChicago O'Hare Intl

Aug 16

ORD11:36 amChicago O'Hare Intl

13h 23m

1 stop

AUS12:59 amAustin Bergstrom

$171

Find similar

Frontier flights from Austin to Illinois

Our best Frontier deals on Austin to Illinois flight tickets

Frontier

Oct 17

AUS10:59 amAustin Bergstrom

2h 49m

ORD1:48 pmChicago O'Hare Intl

Oct 20

ORD7:15 amChicago O'Hare Intl

2h 50m

AUS10:05 amAustin Bergstrom

$111

Find similar

Frontier

Sep 8

AUS11:27 amAustin Bergstrom

2h 53m

ORD2:20 pmChicago O'Hare Intl

Sep 12

ORD7:30 amChicago O'Hare Intl

3h 07m

AUS10:37 amAustin Bergstrom

$144

Find similar

Frontier

Sep 22

AUS11:27 amAustin Bergstrom

2h 53m

ORD2:20 pmChicago O'Hare Intl

Sep 29

ORD7:30 amChicago O'Hare Intl

3h 07m

AUS10:37 amAustin Bergstrom

$154

Find similar

Fly from

Fly to

Route

Depart

Return

Price

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

vie. 10/17

10:59 am-1:48 pm

Nonstop2h 49m

Chicago O'Hare Intl

lun. 10/20

7:15 am-10:05 am

Nonstop2h 50m

$111

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

lun. 9/8

11:27 am-2:20 pm

Nonstop2h 53m

Chicago O'Hare Intl

vie. 9/12

7:30 am-10:37 am

Nonstop3h 07m

$144

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

jue. 8/28

12:45 pm-2:55 pm

Nonstop2h 10m

Lambert-St Louis

jue. 9/4

10:05 am-12:05 pm

Nonstop2h 00m

$157

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

jue. 8/14

7:15 am-7:07 pm

1 stop11h 52m

Chicago O'Hare Intl

mar. 8/19

11:36 am-8:45 pm

1 stop9h 09m

$160

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

jue. 9/18

12:45 pm-2:55 pm

Nonstop2h 10m

Lambert-St Louis

mié. 9/24

6:10 am-10:20 am

1 stop4h 10m

$167

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

mié. 8/13

7:15 am-7:07 pm

1 stop11h 52m

Chicago O'Hare Intl

sáb. 8/16

11:36 am-12:59 am

1 stop13h 23m

$168

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

jue. 9/4

6:00 am-8:49 am

Nonstop2h 49m

Chicago O'Hare Intl

lun. 9/8

9:10 pm-11:55 pm

Nonstop2h 45m

$169

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

sáb. 8/23

8:00 am-10:50 am

Nonstop2h 50m

Chicago O'Hare Intl

lun. 8/25

8:26 am-11:08 am

Nonstop2h 42m

$170

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

mar. 8/19

12:48 pm-3:43 pm

Nonstop2h 55m

Chicago O'Hare Intl

jue. 8/21

7:15 am-10:08 am

Nonstop2h 53m

$193

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

sáb. 9/13

5:30 am-12:25 pm

2 stops6h 55m

Lambert-St Louis

lun. 9/15

6:15 am-10:58 am

1 stop4h 43m

$197

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Austin to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Austin is in April. Flight prices, which tend to average around $247, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of April, then flying in June is also cheap. Prices for this month can be found on momondo for an average of $267.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Austin to Illinois is on a Thursday when prices can be found for as low as $381. Flights from Austin to Illinois on a Sunday will generally be more expensive and average around $721. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Austin to Illinois during this time can be as low as $337. Flights in the afternoon are often more expensive with an average ticket price of $574.

What is the cheapest Austin Bergstrom to Illinois flight route?

Fly from Austin Bergstrom to Chicago O'Hare Intl for the best Austin Bergstrom - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Austin when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $326 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Austin for as low as $238 on momondo.

What cabin class options are available on Austin Bergstrom to Illinois flights?

There are 4 cabin classes available to choose from on Austin Bergstrom to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Austin to Illinois flights?

No. A direct flight is the cheapest option for a flight between Austin to Illinois.

Cheap Austin to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Austin to Illinois

Best Price Found	$75
Fastest flight time	2h 00m
Direct flights	Every day
Airports in Illinois	3 airports

The best one-way flight to Illinois from Austin in the past 72 hours is $75. The best round-trip flight deal from Austin to Illinois found on momondo in the last 72 hours is $111.

The fastest flight from Austin to Illinois takes 2h 00m

Direct flights go from Austin to Illinois every day.

There are 3 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL)

Search flight deals

When did momondo last update prices for flights from Austin Bergstrom Airport to Illinois?
Prices for flights from Austin Bergstrom Airport to Illinois refresh daily.
How many operators does momondo search for flights from Austin Bergstrom Airport to Illinois?
As of July 2025, there are 6 operators available to choose from for flights from Austin Bergstrom Airport to Illinois.
How old do you have to be to fly from Austin Bergstrom Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Austin Bergstrom Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Austin to Illinois?
Based on momondo bookings for flights between Austin and Illinois, the leading plane model is Boeing 737 MAX 8, making up 18.61% of the total bookings. Other popular models include Boeing 737-800 with 17.36%, Airbus A319 with 16.48%, and Boeing 737-900 with 9.87%.

Best airlines flying from Austin to Illinois

Compare and see reviews for airlines that fly from Austin to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $62	Free Cancellation	Rating 5.9 3,239 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $103	Free Cancellation	Rating 6.3 8,048 reviews	Search Spirit Airlines flights
Southwest	PriceFrom $162	Free Cancellation	Rating 8.0 4,246 reviews	Search Southwest flights
American Airlines	PriceFrom $166	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $198	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights
Delta	PriceFrom $216	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Austin to Illinois?

Finding the right flight to Illinois from Austin is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

Can I find flights from Austin to Illinois with flexible booking policies on momondo?

Yes. All flights to Illinois from Austin on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Austin to Illinois?

momondo provides multiple filters to help you find the best flight to Illinois from Austin. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Austin to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Austin to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

mar. 8/5

mar. 8/12

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Illinois

Popular cities in Illinois

Flights to New Yorkfrom $39

Flights to Los Angelesfrom $37

Flights to Miamifrom $58

Flights to Chicagofrom $59

Flights to Orlandofrom $54

Flights to Las Vegasfrom $35

Flights to San Franciscofrom $49

Flights to Washington, D.C.from $49

Flights to Bostonfrom $77

Flights to Atlantafrom $29

Flights to Dallasfrom $55

Flights to Seattlefrom $93

Cheap flights from Austin to Illinois from $75

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Austin to Illinois departing on 11/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Austin to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Spirit Airlines flights from Austin to Illinois

Our best Spirit Airlines deals on Austin to Illinois flight tickets

Frontier flights from Austin to Illinois

Our best Frontier deals on Austin to Illinois flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Austin to Illinois that are best for you.

See travel insights to Illinois from

How to get the cheapest flight ticket from Austin to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Austin to Illinois during this time can be as low as $337. Flights in the afternoon are often more expensive with an average ticket price of $574.

What is the cheapest Austin Bergstrom to Illinois flight route?

Fly from Austin Bergstrom to Chicago O'Hare Intl for the best Austin Bergstrom - Illinois flight prices

How far in advance should I book a flight to Illinois?

What cabin class options are available on Austin Bergstrom to Illinois flights?

There are 4 cabin classes available to choose from on Austin Bergstrom to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Austin to Illinois flights?

No. A direct flight is the cheapest option for a flight between Austin to Illinois.

What is the cheapest airline that flies from Austin Bergstrom to Illinois?

Frontier, Spirit Airlines, and Southwest are the most popular carriers operating from Austin Bergstrom to Illinois

What airlines fly to Illinois?

How many flights depart from Austin to Illinois on average per day?

The number of flights available between Austin and Illinois is 36 per day as of July 2025. The most frequent departure time is 3:00PM, with 46% of daily flights leaving at noon.

How many flights depart from Austin to Illinois on average per week?

As of July 2025, 253 flights take off from Austin and land in Illinois each week. The most common flight departure day for this route is Thu, with 20% of weekly flights taking off on this day.

Cheap Austin to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Austin to Illinois

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

When did momondo last update prices for flights from Austin Bergstrom Airport to Illinois?

How many operators does momondo search for flights from Austin Bergstrom Airport to Illinois?

How old do you have to be to fly from Austin Bergstrom Airport to Illinois?

What documentation or ID do you need to fly to Illinois?

What is the most popular plane model from Austin to Illinois?

Best airlines flying from Austin to Illinois

Compare and see reviews for airlines that fly from Austin to Illinois with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Austin to Illinois?

Can I find flights from Austin to Illinois with flexible booking policies on momondo?

How can momondo help me find flights from Austin to Illinois?

I’m not ready to book a flight from Austin to Illinois right now. Can momondo alert me if prices change?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo